Magnifying attachment for a camera

Abstract

The object of this invention is to provide a magnifying attachment to be attached to a camera by which a high magnification image can be obtained without appearing a part having no image in the image. The magnifying attachment has a magnifying objective lens ( 21 A), a field lens ( 21 B) for converting a light passed through the objective lens ( 21 A) into collimated light, and a converging lens ( 21 C) for focusing the collimated light on a camera lens ( 42 ). Light passed through the converging lens ( 21 C) is converged on a pupil ( 42 X) of the camera lens ( 42 ) with a solid angle exceeding the view angle of the camera lens ( 42 ).

1. A magnifying attachment which is attached to and used with a camera having a camera lens, for magnifying an image to be taken by the camera, the magnifying attachment comprising:
 a main body which is detachably fixed to the camera; 
 an objective lens which is fitted with the main body; 
 a converging lens which is fitted with the main body, 
 wherein the objective lens allows an image light from an object to be imaged to pass therethrough to magnify the image light, and wherein the converging lens allows the image light that has passed through the objective lens to pass therethrough to converge the passed image light on a pupil of the camera lens of the camera with a solid angle that is substantially equal to or larger than a viewing angle of the camera lens, when the main body is fitted with the camera; and 
 a field lens that is fitted with the main body, 
 wherein the field lens allows the image light that has passed through the objective lens to pass therethrough to adjust the passed image light so as to enter the entire converging lens, and wherein the converging lens allows the image light that has passed through the field lens to pass therethrough to converge the passed image light on the pupil of the camera lens with a solid angle that is substantially equal to or larger than a viewing angle of the camera lens, when the main body is fitted with the camera, and 
 wherein the main body is equipped with an aperture that narrows the image light to deepen a focal depth when the main body is fitted with the camera. 
 
     
     
       2. A magnifying attachment according to  claim 1 , wherein the converging lens allows the image light that has passed through the objective lens to pass therethrough to converge the passed image light on a pupil of the camera lens of the camera with a solid angle that is equal to or larger than a viewing angle of the camera lens, when the main body is fitted with the camera, and
 wherein the converging lens allows the image light that has passed through the field lens to pass therethrough to converge the passed image light on the pupil of the camera lens with a solid angle that is equal to or larger than a viewing angle of the camera lens, when the main body is fitted with the camera. 
 
     
     
       3. A magnifying attachment according to  claim 1 , wherein the converging lens allows the image light that has passed through the objective lens to pass therethrough to converge the passed image light within an area of the pupil of the camera lens provided to the camera with a solid angle that is substantially equal to a viewing angle of the camera lens. 
     
     
       4. A magnifying attachment according to  claim 1 , wherein the field lens converts the image light that has passed through the field lens into a collimated light. 
     
     
       5. A magnifying attachment according to  claim 4 , wherein the converging lens and the field lens have the same diameter. 
     
     
       6. A magnifying attachment according to  claim 1 , wherein the main body can be detachably fixed to a fixture, wherein the fixture can be detachably fixed with the camera, and wherein the main body is fixed to the camera through the fixture. 
     
     
       7. A magnifying attachment according to  claim 1 , further comprising a lighting unit that can irradiate the object to be imaged with an illuminations light when imaging is carried out. 
     
     
       8. A magnifying attachment according to  claim 1 , wherein the camera is a camera that is fitted with a camera-equipped mobile phone. 
     
     
       9. A magnifying attachment according to  claim 1 , wherein the objective lens is detachably attached to the main body. 
     
     
       10. A magnifying attachment according to  claim 1 , wherein the objective lens and the field lens are detachably attached to the main body. 
     
     
       11. A magnifying attachment according to  claim 1 , wherein the objective lens and the field lens are integrated. 
     
     
       12. A magnifying attachment according to  claim 1 , wherein the magnifying attachment includes only three lenses through which the image light passes, the three lenses comprising the objective lens, the converging lens, and the field lens. 
     
     
       13. A magnifying attachment according to  claim 12 , wherein at least one of the objective lens, the converging lens, and the field lens is formed of a plurality of lenses.